Presents three classification activities in which students work in cooperative small groups using physical materials to foster flexible thinking in doing mathematics. Concludes that attribute blocks are useful physical manipulatives for promoting classification activities and problem-solving skills. (ASK)

Whether physical activity and verbal communication would affect kindergarten students' scores on the Metropolitan Readiness Tests (MRT) was investigated. Twenty subjects were administered Level I of the MRT when they entered kindergarten. For 5 days per week for 4 weeks, the 10 subjects in the experimental group worked at constructive play tasks…